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Finding the Fourth Proportional to 96,571.20, 144,856.80 and 76,742.40

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Solution

The fourth proportional to 96,571.20, 144,856.80 and 76,742.40 is: 115,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,571.20 : 144,856.80 = 76,742.40 : x
  2. Step 2: Convert to fraction form
    96,571.20/144,856.80 = 76,742.40/x
  3. Step 3: Cross multiply
    96,571.20x = 144,856.80 × 76,742.40
  4. Step 4: Simplify right side
    96,571.20x = 11,116,658,488.32
  5. Step 5: Solve for x
    x = 11,116,658,488.32/96,571.20
  6. Step 6: Final answer
    x = 115,113.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.